{
  "manageEntity": {
    "action": "Save",
    "entityId": "951896908",
    "entityType": "Track",
    "nonce": "0x199dc78cf18daa9ca4475e1e0d5be904ce5788a87234e1d69582546c3d824741",
    "signature": "0x63b89a78bcde8887a2c093712ff4c6993f29d5f45444b33ac9761dd5a772ffda711476b0bc3064f437548f4877d1aeab1e1b4d91e6c30f57c8499cbe7c9441f91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}